a72d6c8975
or timezone fields so ensure these are set. Reported by: emaste Sponsored by: DARPA, AFRL
153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
/*-
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* Copyright (c) 2017 Andrew Turner
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/efi.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include "clock_if.h"
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static void
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efirtc_identify(driver_t *driver, device_t parent)
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{
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struct efi_tm tm;
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int error;
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/*
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* Check if we can read the time. This will stop us attaching when
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* there is no EFI Runtime support, or the gettime function is
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* unimplemented, e.g. on some builds of U-Boot.
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*/
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error = efi_get_time(&tm);
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if (error != 0)
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return;
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if (device_find_child(parent, "efirtc", -1) != NULL)
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return;
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if (BUS_ADD_CHILD(parent, 0, "efirtc", -1) == NULL)
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device_printf(parent, "add child failed\n");
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}
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static int
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efirtc_probe(device_t dev)
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{
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device_quiet(dev);
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return (0);
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}
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static int
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efirtc_attach(device_t dev)
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{
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clock_register(dev, 1000000);
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return (0);
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}
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static int
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efirtc_detach(device_t dev)
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{
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clock_unregister(dev);
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return (0);
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}
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static int
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efirtc_gettime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct efi_tm tm;
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int error;
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error = efi_get_time(&tm);
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if (error != 0)
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return (error);
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ct.sec = tm.tm_sec;
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ct.min = tm.tm_min;
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ct.hour = tm.tm_hour;
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ct.day = tm.tm_mday;
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ct.mon = tm.tm_mon;
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ct.year = tm.tm_year;
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ct.nsec = tm.tm_nsec;
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return (clock_ct_to_ts(&ct, ts));
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}
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static int
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efirtc_settime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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struct efi_tm tm;
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clock_ts_to_ct(ts, &ct);
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bzero(&tm, sizeof(tm));
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tm.tm_sec = ct.sec;
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tm.tm_min = ct.min;
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tm.tm_hour = ct.hour;
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tm.tm_mday = ct.day;
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tm.tm_mon = ct.mon;
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tm.tm_year = ct.year;
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tm.tm_nsec = ct.nsec;
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return (efi_set_time(&tm));
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}
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static device_method_t efirtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, efirtc_identify),
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DEVMETHOD(device_probe, efirtc_probe),
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DEVMETHOD(device_attach, efirtc_attach),
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DEVMETHOD(device_detach, efirtc_detach),
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/* Clock interface */
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DEVMETHOD(clock_gettime, efirtc_gettime),
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DEVMETHOD(clock_settime, efirtc_settime),
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DEVMETHOD_END
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};
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static devclass_t efirtc_devclass;
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static driver_t efirtc_driver = {
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"efirtc",
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efirtc_methods,
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0
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};
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DRIVER_MODULE(efirtc, nexus, efirtc_driver, efirtc_devclass, 0, 0);
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